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RDF30U Room Temperature Controller with LCD 

Technical Instructions 

For Four-Pipe Fan Coil Units 

Document Number 155-335 

 

September 27, 2007 

Siemens Industry, Inc. 

Page 5 

 

 

Table 1.  Control Parameters. 

 

Para-

meter 

Description 

Setting Range 

Factory  

Setting 

P01 

Heating setpoint in Economy mode  
(operating mode changeover contact activated ) 

OFF,  
41

F to 68

F (5

C to 20

C) (in increments 

of 0.5 K) 

61

(16

C) 

P02 

Cooling setpoint in Economy mode  
(operating mode changeover contact activated ) 

OFF,  
70

F to 95

F (21

C to 35

C) (in 

increments of 0.5 K) 

82

(28

C) 

P03 

Heating setpoint in Standby “

 

OFF,  
41

F to 68

F (5

C to 20

C) (in increments 

of 0.5 K) 

46

(8

C) 

P04 

Cooling setpoint in Standby “

 

OFF, 
70

F to 95

F (21

C to 35

C) (in 

increments of 0.5 K) 

OFF 

P05 

Minimum setpoint limitation in Normal mode 

41

F to 68

F (5

C to 20

C) (in increments 

of 0.5 K) 

41

(5°C) 

P06 

Maximum setpoint limitation in Normal mode 

70

F to 95

F (21

C to 35

C) (in 

increments of 0.5 K) 

95

(35°C) 

P09 

Sensor calibration 

-3 K to 3 K (-5.4

F to 5.4

F) (in increments 

of 0.5 K) 

0 K 

P10 

P-band in Heating mode or switching differential heating. 

NOTE:

 This parameter is in degrees Kelvin, 1 K = 1.8

F. 

0.5 K to 4 K (1°F to 7°F) (in increments of 
0.5 K) 

2 K 
(3.6

°F)

 

P11 

P-band in Cooling mode or switching differential cooling. 

NOTE:

 This parameter is in degrees Kelvin, 1 K = 1.8

F. 

0.5 K to 4 K (1°F to 7°F) (in increments of 
0.5 K) 

1 K 
(1.8

°F)

 

P12 

Dead zone in Normal mode 

0.5 K to 10 K (1°F to 18°F) (in increments 
of 0.5 K) 

2 K 
(3.6

°F)

 

P13 

Active temperature sensor (no setting, display only) 

1: Room temperature sensor active 
2: Return air temperature sensor active 

-- 

P14 

Value of current room temperature reading  
(no setting, display only) 

32

F to 120

F (0

C to 49

C) = current 

temperature value 

-- 

P17 

Fan control in Economy mode 
OFF: Fan is off in the dead zone 
ON: Fan is on in the dead zone, 

ON: Running at the selected speed or at 
speed 1 if in Standby 

 

 

OFF 

P18 

Setpoint differential 

0.5

K to 5

K (1°F to 9°F)  

(in increments of 0.5 K) 

2 K 
(3.6°F) 

P19 

Minimum output on time (4, 6) 

1 to 20 minutes (in increments of 1 min.) 

1 min.

 

 

P20 

Minimum output off time (4, 5) 

1 to 20 minutes (in increments of 1 min.) 

1 min.

 

 

P21 

Fan overrun 

0 to 300 seconds (in increments of 10 s) 

0 s 

P22 

Point of reference for setpoint in Normal mode 

HA: Heating sequence;  
CL: Cooling sequence 

HA 

P23 

Display unit of measure 

°

F, 

°

°

Summary of Contents for RDF30U

Page 1: ...ting mode changeover input for remote control Day Night Air movement control function for avoiding damage resulting from moisture Selectable installation and control parameters Display of room temperature or setpoint selectable Electronic minimum and maximum setpoint limits Operating voltage 24 Vac Application Typical use For controlling room temperature in individual rooms that are heated or cool...

Page 2: ...wing occurs leaving the heating or cooling sequence provided the Temperature dependent fan control function is activated manually changing to Standby provided no setpoints example for freeze protection are set and active activating an external operating mode changeover switch provided application conditions do not call for Economy mode turning off the controller s power supply Display If DIP Switc...

Page 3: ... the measured room temperature or the fan coil unit s return air temperature It detects if a QAH11 1 cable temperature sensor is connected to input 9 8 and then operates automatically according to that temperature Operating Modes Normal Mode Heating or Cooling mode with automatic changeover and manually selected fan speed III II or I In Normal mode the controller maintains the adjusted setpoint in...

Page 4: ...g operation without opening the unit In the event of a power failure all set control parameters will be maintained Settings The parameters can be changed as follows 1 Set the operating mode selector to Standby 2 Press buttons and simultaneously for a minimum of three seconds Release them and within two seconds press the button again for three seconds The display will show P01 3 Select the required...

Page 5: ... or switching differential heating NOTE This parameter is in degrees Kelvin 1 K 1 8 F 0 5 K to 4 K 1 F to 7 F in increments of 0 5 K 2 K 3 6 F P11 P band in Cooling mode or switching differential cooling NOTE This parameter is in degrees Kelvin 1 K 1 8 F 0 5 K to 4 K 1 F to 7 F in increments of 0 5 K 1 K 1 8 F P12 Dead zone in Normal mode 0 5 K to 10 K 1 F to 18 F in increments of 0 5 K 2 K 3 6 F ...

Page 6: ...nical Design The controller consists of two parts Plastic housing which accommodates the electronics the operating elements and the built in room temperature sensor Base The housing engages in the base and is secured with two screws The base carries the screw terminals The DIP switches are located at the rear of the housing Setting and Operating Elements Figure 2 RDF30U Components 1 Display of the...

Page 7: ... Changeover activated when switch is open 4 Output sequence Heating and cooling four pipe Two stage cooling Mounting Installation and Commissioning Notes Mounting location On a wall or inside the fan coil unit Do not mount in niches or bookshelves behind curtains above or near heat sources Do not mount in direct sunlight Mounting height is approximately 60 inches 1 5 m above the floor The connecti...

Page 8: ...eter P09 Specifications Power Supply Operating voltage 24 Vac 20 25 Frequency 50 60 Hz Power consumption 6 VA maximum Fan control outputs 12 11 10 24 Vac Rating 5 3 A maximum Valve control output 4 6 NO 24 Vac 55 3 A maximum Return air temperature sensor QAH11 1 safety class II status input 9 8 NTC resistor 3 k at 77 F 25 C Status input D1 and GND Contact sensing SELV 6 to 15 Vdc 3 to 6 mA Insulat...

Page 9: ...Terminals Figure 4 Wiring Terminals 1 2 24 Vac negative 3 24 Vac positive 4 Control valve output 24 Vac 5 Control valve output 24 Vac inverse of output 4 6 Control output second stage heating or cooling NO contact 8 Measuring neutral remote sensor 9 Return air temperature sensor 10 Control output Fan speed III 24 Vac 11 Control output Fan speed II 24 Vac 12 Control output Fan speed I 24 Vac D1 Sta...

Page 10: ...rademarks of their respective owners 2007 Siemens Industry Inc Siemens Industry Inc Building Technologies Division 1000 Deerfield Parkway Buffalo Grove IL 60089 1 847 215 1000 Your feedback is important to us If you have comments about this document please send them to SBT_technical editor us sbt siemens com Document No 155 335 Printed in the USA Page 10 Dimensions in Inches Millimeters Figure 6 R...

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